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Letters Patent No. 74,761, dated February 25, 1868,

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Be it known that I, DANIEL W. JOHNSON, of" Bloomsburg', in the county of Columbia, and State lof-Pejrnsylvania, have invented a new and valuable Improvement in Whiille-Trees and I do hereby declare tha'fthc following is a. full,'clear, and exact description of the construction and operation of the same, reference ,being had to the annexed drawings, making a part of ths'speciication, and to the letters and figures of ref'iro'nee marked thereon. f

The object of my invention is to provide better means than have heretofore been devised-for detsrliing a horse from s carriage, when, in consequence of a runaway or other circumstances, itl may be desirable tu detach the horse instantaneously. To this. end, I construct a whiiile-tree in the form shown in the drawings- VFigure 1 being a plan view, and Figure 2 a sectional viewthereof.- Letter is a spiral spring, extending from near the centre of the whillle-tree, outward, about six inches, more or less. Its inner` end is attached to thewhille-tree, as represented, and at its outer end it is connected with a slide, marked B. The slide'B extends, from the point of its connection with spring A, to and under the lp of the button C, as shown onlg. 2. The button C is fastened to the' whie-tree, near its end, hy a. bolt, en which it swings, the inner end thereof` being constructed with a lip, as represented, and theoutcr end extending to and beyond the guard D.; This button C is perforated near its outer end, and the perforation is adapted` toI and reccivesthe point of guard D, as shown on fig. 2. Letter H represents a series of levers,-constructe d 1., and connected in the" form shown on fig. 1, the outer one of which is attached to the slide Letter K is a.

double chain, attached, in the manner represented, to the inside ends of the series of levers Hr VThis-chain K extends below the cross-bar of the carriage-shafts, on which the whiilletree is placed, where it is united with a lever marked M. Said lever M, and the method of its adjustment `and connection with 'the chain, Vis shown on iig. 3 of the drawings. At the end of lever M, next the carriage, I attach a chain or wire, .that leads into the body of the carriage.v On the under side of the carriage-shaft I adjust lugs, in the 'form shown by letter- 0, on iig. 8.' The forward parts of these lugs are made of thih metal, so as to allow them to spring downward with ease, and therebyncr no obstruction to the detachixig-process. v

My device is operated as follows:- Whenever, for ,any reason, it is deemed important to` detach the horse from the carriage, the driver-raises the chain or wire in the carriage, and pulls it upward with considerable force. This movement, operating through the levers, springs, and slide above mentioned, releases the slide from the lip of the button C. Now, as the tugs of the harness are held by button C, it follows thatby releasing the slide from the lip of sa'id'button, the same swingsforward, and the horse is free.

o and arranged substantially as specified -What I claim asmy invention, and desire 'to secure by Letters Patent, is- A whiie-tree, having spring A, slide B, leversH'and M, chains K, and button C, constructed, combined,

".DANIELw'.' JOHNSON.

Witnesses:

B. F. KINNEY, M. L. Hausmcnr. 

